package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import com.sky.vo.EditPasswordVO;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.time.LocalDateTime;
import java.util.List;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        // 密码比对
        // 对密码进行md5加密，然后再进行比对
        password = DigestUtils.md5DigestAsHex(password.getBytes());
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }

    /**
     * 新增员工
     *
     * @param employeeDTO
     */
    @Override
    public void save(EmployeeDTO employeeDTO) {
        Employee employee = new Employee();
        //使用对象属性拷贝 前面为原对象 后面为目标对象
        BeanUtils.copyProperties(employeeDTO, employee);

        //账号的状态 默认为1表示正常 0表示禁用
        employee.setStatus(StatusConstant.ENABLE);

        //设置密码 默认都为123456
        employee.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()));

        //创建时间和最后修改时间
        //employee.setCreateTime(LocalDateTime.now());
        //employee.setUpdateTime(LocalDateTime.now());

        //通过线程取出员工的id
        //Long empId = BaseContext.getCurrentId();
        // 设置创建人id和修改人id
        //employee.setCreateUser(empId);
        //employee.setUpdateUser(empId);

        employeeMapper.insert(employee);
    }

    /**
     * 员工分页查询
     * @param employeePageQueryDTO
     * @return
     */
    @Override
    public PageResult pageQuery(EmployeePageQueryDTO employeePageQueryDTO) {
        PageHelper.startPage(employeePageQueryDTO.getPage(), employeePageQueryDTO.getPageSize());
        Page<Employee> page = employeeMapper.pageQuery(employeePageQueryDTO);

        long total = page.getTotal(); //总记录数
        List<Employee> records = page.getResult(); //结果集
        return new PageResult(total, records);
    }

    /**
     * 员工禁用
     * @param status
     * @param id
     */
    @Override
    public void startOrStop(Integer status, Long id) {
         Employee employee = Employee.builder()
                        .status(status)
                                .id(id).build();
        employeeMapper.update(employee);
    }

    /**
     * 根据id查询员工信息
     * @param id
     * @return
     */
    @Override
    public Employee getById(Long id) {
        Employee employee = employeeMapper.getById(id);
        employee.setPassword("****");
        return employee;
    }

    /**
     * 修改员工信息
     * @param employee
     * @return
     */
    @Override
    public void updateEmp(Employee employee) {
        //employee.setUpdateTime(LocalDateTime.now());
        //employee.setUpdateUser(BaseContext.getCurrentId());
        employeeMapper.updateEmp(employee);
    }

    /**
     * 修改密码
     * @param editPasswordVO
     * @return
     */
    @Override
    public void editPassword(EditPasswordVO editPasswordVO) {
        //获取当前操作的员工
        Long userId = BaseContext.getCurrentId();

        //需要对新密码和修密码进行加密
        String oldPassword = editPasswordVO.getOldPassword();
        String newPassword = editPasswordVO.getNewPassword();

        oldPassword = DigestUtils.md5DigestAsHex(oldPassword.getBytes());
        newPassword = DigestUtils.md5DigestAsHex(newPassword.getBytes());

        editPasswordVO.setOldPassword(oldPassword);
        editPasswordVO.setNewPassword(newPassword);
        editPasswordVO.setEmpId(Math.toIntExact(userId));

        employeeMapper.updatePassword(editPasswordVO);
    }
}
